Finding the Fourth Proportional to 105,002.15, 157,503.23 and 78,758.15

Step by Step Solution

1. Step 1: Write the proportion equation
   105,002.15 : 157,503.23 = 78,758.15 : x
2. Step 2: Convert to fraction form
   105,002.15/157,503.23 = 78,758.15/x
3. Step 3: Cross multiply
   105,002.15x = 157,503.23 × 78,758.15
4. Step 4: Simplify right side
   105,002.15x = 12,404,662,620.03
5. Step 5: Solve for x
   x = 12,404,662,620.03/105,002.15
6. Step 6: Final answer
   x = 118,137.23